The Victor 4800 was the "top of the line" in Victor's first generation
of desktop, programmable electronic calculators. Also included in the line
were the 4500, 4600, and 4700, all introduced in 1973.
The machines all used an impact dot-matrix printer (no display), and all but
the 4500 had a magnetic card peripheral built in to read and store programs
and data onto magnetic cards. Each magnetic card had two 'edges', upon which 128
program steps, or 16 memory registers could be stored. All of the machines
were six function calculators (add, subtract, multiply, divide, square root and percentage). All of the machines had two direct keyboard access
accumulator-style memory registers, with additional store/recall addressable
memory registers.
The 4500 offered 128 steps and 6 addressable memory registers, with no mag card peripheral.
The 4600 was the same as the 4500, but included the mag card reader.
The 4700 provided 512 program steps, and 52 addressable memory registers
The top of the line 4800 as shown here offered 1000 program steps, and 100
addressable memroy registers.
List prices were $995 for the 4500; $1,295 for the 4600; $1,595 for the
4700, and $1,995 for the 4800. These machines were superceded by the
Victor 4900,
a second-generation of the 4000-series machines, introduced in January
of 1976. The 4900 added additional higher-level math functions, and
significantly increased the number of program step and memory register
storage.

Sincere thanks to George Newby for the information made available here.